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Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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May 31, 2024 | May 31, 2023 | May 31, 2022
Deferred Compensation Plans [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Percentage of annual base salary and bonus that eligible employees may defer | 50.00% |  |
Percentage of Board cash compensation that eligible outside directors may defer | 100.00% |  |
Amounts accrued under deferred compensation plans | $ 33.9 | $ 28.3 |
401(K) Plan [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Maximum percentage of salary deferral | 50.00% |  |
Years of service to be eligible for matching contribution | 1 year |  |
Minimum number of hours worked for eligibility | 1,000 |  |
Employer's matching contribution as a percent of the first 3% of employees' salary contributed | 100.00% |  |
Percentage of employees' salary contributed matched 100% by employer | 3.00% |  |
Employer's matching contribution as a percent of the next 2% of employees' salary contributed | 50.00% |  |
Percentage of employees' salary contributed matched 50% by employer | 2.00% |  |
Total percentage of employees' salary contributed matched by employer | 4.00% |  |
Company contributions to the plan | $ 37.5 | $ 36.6 | $ 35.6
Percentage participant directed | 100.00% |  |

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- Definition The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -SubTopic 10 -Name Accounting Standards Codification -Section 30 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483043/710-10-30-1 + Details
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